Get Two Free Compute Units from Oracle Cloud

Oracle is currently offering an always free tier of its compute cloud. In this article, I will show how to register an account, add the free tier units and connect to them via PuTTY on Windows.

What is included?

While the offer is actually free for an unlimited time, the following restrictions apply:

  • 2 database services are included (ATP serverless and ADW) limited to 1 OCPU and up to 20 GB
  • 2 compute services (1 GB RAM and 1/8 OCPU each)
  • a valid credit card and phone number are required for the registration process
  • 250 EUR of cloud credits are also included but must be used in the first 30 days

Getting started

Browse to https://www.oracle.com/cloud/free/ and register an account. After login, you will be welcomed by the following dashboard:

Navigate to “Create a VM instance”, enter a name (or leave the default) and choose your favourite operating system. However, only a few of them are eligible for the free tier:

Before hitting the “Create” button, you need to setup your SSH authentication.

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Installing Kali Linux: Fix “Couldn’t mount CD ROM” error

This is going to be a short one. You may be experiencing troubles when installing Kali Linux via an USB flash drive:

Your installation CD-ROM couldn't be mounted. This probably means that the CD-ROM was not in the drive. If so you can insert it and try again.

You may be inclined to waste a few hours following one of the countless articles suggesting to manually open a shell, change the way your USB stick is mounted and try to fix the issue that way.

However, chances are there is a simpler solution in case you are using the popular “LiLi USB Creator” tool on Windows for preparing your flash drives. This solution is: forget LiLi USB Creator and use Win32 Disk Imager instead. Everything will work fine, you can thank me later.

Install Kismet on Ubuntu 19.04 from Source

Install Kismet on Ubuntu 19.04 from Source

Imagine someone watching all your daily activities from hundreds of meters in the distance. While walls can protect you from spy glasses and interested neighbours looking out of their windows, they are no obstacle for electromagnetic radiation. WiFi networks in particular often build the backbone of our homes’ communication infrastructure: when you come home, your phone connects to your WiFi; when you turn on your video gaming console, it connects to your WiFi; when you leave, the WiFi connection to your phone is removed.

There are ways to measure such WiFi activities which require nothing but some cheap pieces of hardware, the right software tools and a little bit of network knowledge. In this post series, I want to investigate this topic, present state of the art tools and ways to set them up and give advice on what can be done to protect against the described invasions of your privacy.

Part 1 explains how to install Kismet – the swiss army knife for network monitoring.

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